Answer:
A & C
Step-by-step explanation:
During creation of the solar system, the materials with higher melting and boiling point within the nebulae were able to coalesce close to the sun because they are less volatile. These materials also happen to be denser. Denser materials have more mass and therefore pulled on more by the gravitational forces of the sun. The more volatile material such as gases was able to coalesce further from the sun –where the gases can cool below boiling and melting points- to form the gas giants such as Jupiter.